condition mean min max ZT0-3 0.41513225 0.2803825 0.549882 ZT4-7 0.57036 0.57036 0.57036 ZT8-11 0.41935350000000005 0.41935350000000005 0.41935350000000005 ZT12-15 0 0 0 ZT16-19 0.5513915 0.5513915 0.5513915 ZT20-23 0.4146365 0.4146365 0.4146365